MINNEAPOLIS, MN – April 30, 2013 – Donaldson Company, Inc. (NYSE: DCI) is pleased to announce that Mark Rigby has been named General Manager of its Global Aerospace & Defense group, effective May 1st. The Global Aerospace & Defense group provides advanced filtration solutions to market segments that include military wheeled and tracked vehicles, rotorcraft, military fixed-wing aircraft, commercial aircraft, general aviation and marine vessels. The Global Aerospace & Defense group has its headquarters in Bloomington, MN and includes three additional locations: St. Louis, MO, Valencia, CA, and Paris, France.

The group is included in Donaldson’s Engine Products segment, and Rigby will report to Tod Carpenter, Senior Vice President of Engine Products for Donaldson. Rigby succeeds Sheila Peyraud, who was previously named Vice President and Chief Technical Officer of Donaldson.

“Selecting an experienced, customer-focused leader like Mark is the best way to ensure the continued success of our Global Aerospace & Defense business,” Carpenter said. “I am confident that our Customers will benefit from Mark’s international experience, broad knowledge of Donaldson media technology, and strong leadership skills as we continue to grow the business globally.”

Rigby has held several senior positions since joining Donaldson in 1996 through the acquisition of DR Technologies Ltd., the European distributor of Tetratex® polytetrafluoroethylene (PTFE) membranes. He served as Director for Membranes in Europe in October 1998 and managed the formation of Donaldson’s Advanced Filtration Business group in Europe in 2008. In January 2010, he became General Manager of Membranes, based in Ivyland, PA. A veteran of the British Army, Rigby holds an electronics engineering degree and a Management Diploma from The Open University of the United Kingdom.

Donaldson’s Aerospace & Defense Group is a leading worldwide provider of filtration systems for the aerospace and defense industry. Our filtration solutions protect fixed-wing aircraft, rotorcraft, military ground vehicles, electronic equipment, space vehicles, missiles, military shipboard systems and amphibious vehicles. We are committed to advancing filtration technology and providing quality products and prompt customer service. Our group serves customers from sales, engineering and manufacturing locations around the world.

About Donaldson Company

Donaldson is a leading worldwide provider of filtration systems that improve people’s lives, enhance our Customers’ equipment performance and protect our environment. We are a technology-driven Company committed to satisfying our Customers’ needs for filtration solutions through innovative research and development, application expertise and global presence. Our approximately 12,800 employees contribute to the Company’s success by supporting our Customers at our more than 140 sales, manufacturing and distribution locations around the world.

Donaldson is a member of the S&P MidCap 400 and Russell 1000 indices, and our shares trade on the NYSE under the symbol DCI. Additional information is available at www.donaldson.com.